php-ai / php-ml

        $targets = [];

        foreach ($weights as $index => $weight) {

            $z = (int)round(($weight - $mean) / $std) - $minZ + 1;

            for ($i=0; $i < $z; $i++) {

                if (rand(0, 1) == 0) {

                    continue;

                }

                $samples[] = $this->samples[$index];

                $targets[] = $this->targets[$index];

            }

        }

        return [$samples, $targets];

        $targets = [];

        srand($index);

        $bootstrapSize = $this->subsetRatio * $this->numSamples;

        for ($i=0; $i < $bootstrapSize; $i++) {

            $rand = rand(0, $this->numSamples - 1);

            $samples[] = $this->samples[$rand];

            $targets[] = $this->targets[$rand];

        }

        return [$samples, $targets];

    }